:root {
    --bg: #06060b;
    --surface: rgba(18, 18, 30, 0.7);
    --surface-solid: #12121e;
    --border: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(255, 255, 255, 0.12);
    --text: #e4e4ef;
    --text2: #9494a8;
    --text3: #5e5e78;
    --accent: #818cf8;
    --accent-glow: rgba(129, 140, 248, 0.3);
    --accent2: #22d3ee;
    --accent2-glow: rgba(34, 211, 238, 0.25);
    --green: #34d399;
    --green-glow: rgba(52, 211, 153, 0.25);
    --amber: #fbbf24;
    --amber-glow: rgba(251, 191, 36, 0.2);
    --red: #f87171;
    --red-glow: rgba(248, 113, 113, 0.2);
    --radius: 10px;
    --radius-sm: 6px;
    --font: 'Inter', 'SF Pro Display', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
    --mono: 'JetBrains Mono', 'Cascadia Code', 'Fira Code', 'Courier New', monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* ── Animated Background ── */
.bg-grid {
    position: fixed; inset: 0; pointer-events: none; z-index: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.015) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.015) 1px, transparent 1px);
    background-size: 64px 64px;
    mask-image: radial-gradient(ellipse 60% 50% at 50% 35%, black 30%, transparent 70%);
}

.bg-orb {
    position: fixed; border-radius: 50%; pointer-events: none; z-index: 0;
    filter: blur(120px); opacity: 0.3;
}
.bg-orb-1 {
    width: 600px; height: 600px;
    background: var(--accent);
    top: -200px; left: -150px;
    animation: orbFloat 20s ease-in-out infinite;
}
.bg-orb-2 {
    width: 500px; height: 500px;
    background: var(--accent2);
    bottom: -150px; right: -150px;
    animation: orbFloat 25s ease-in-out infinite reverse;
}
@keyframes orbFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(40px, -30px) scale(1.05); }
    66% { transform: translate(-20px, 20px) scale(0.95); }
}

.container {
    position: relative; z-index: 1;
    max-width: 1280px; margin: 0 auto; padding: 24px 24px 80px;
}

/* ── Hero ── */
.hero {
    text-align: center; padding: 24px 0 32px; position: relative;
}
.hero-badge {
    display: inline-flex; align-items: center; gap: 8px;
    background: rgba(129, 140, 248, 0.08);
    border: 1px solid rgba(129, 140, 248, 0.15);
    border-radius: 100px; padding: 6px 18px;
    font-size: 12px; font-weight: 500; color: var(--accent);
    letter-spacing: 0.5px; margin-bottom: 24px;
    animation: fadeInUp 0.6s ease;
}
.hero-badge .dot {
    width: 6px; height: 6px; border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 8px var(--accent-glow);
    animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.5); }
}

.hero h1 {
    font-size: 52px; font-weight: 800; letter-spacing: -1.5px;
    line-height: 1.1; margin-bottom: 16px;
    animation: fadeInUp 0.6s ease 0.1s backwards;
}
.hero h1 .gradient-text {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent2) 50%, #c084fc 100%);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero h1 .normal { color: var(--text); }

.hero-desc {
    font-size: 16px; color: var(--text3); max-width: 680px; margin: 0 auto;
    line-height: 1.6; animation: fadeInUp 0.6s ease 0.2s backwards;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ── Stats Strip ── */
.stats-strip {
    display: flex; justify-content: center; gap: 48px;
    margin-bottom: 40px; padding: 20px 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    animation: fadeInUp 0.6s ease 0.3s backwards;
}
.stat-item {
    text-align: center;
}
.stat-value {
    font-size: 24px; font-weight: 700; font-family: var(--mono);
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.stat-label {
    font-size: 11px; color: var(--text3); text-transform: uppercase;
    letter-spacing: 1px; margin-top: 2px;
}

/* ── Config Bar ── */
.config-bar {
    display: flex; gap: 12px; margin-bottom: 36px;
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 14px 20px;
    backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    animation: fadeInUp 0.6s ease 0.35s backwards;
}
.config-field {
    flex: 1; display: flex; align-items: center; gap: 10px;
}
.config-field label {
    font-size: 10px; text-transform: uppercase; letter-spacing: 1px;
    color: var(--text3); white-space: nowrap; font-weight: 600;
}
.config-field input {
    flex: 1; background: rgba(255,255,255,0.03); border: 1px solid var(--border);
    color: var(--text); padding: 9px 12px; border-radius: var(--radius-sm);
    font-size: 13px; font-family: var(--mono);
    transition: border-color 0.2s, box-shadow 0.2s;
}
.config-field input:focus {
    outline: none; border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

/* ── Section Title ── */
.section-title {
    display: flex; align-items: center; gap: 12px;
    margin-bottom: 20px; animation: fadeInUp 0.6s ease 0.4s backwards;
}
.section-title h2 {
    font-size: 14px; font-weight: 600; letter-spacing: 1px;
    text-transform: uppercase; color: var(--text2);
}
.section-title .line {
    flex: 1; height: 1px; background: var(--border);
}

/* ── Grid ── */
.api-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: 18px; margin-bottom: 36px;
}

/* ── Card ── */
.card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 24px;
    display: flex; flex-direction: column;
    backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    animation: cardIn 0.5s ease backwards;
}
.card:nth-child(1) { animation-delay: 0.00s; }
.card:nth-child(2) { animation-delay: 0.05s; }
.card:nth-child(3) { animation-delay: 0.10s; }
.card:nth-child(4) { animation-delay: 0.15s; }
.card:nth-child(5) { animation-delay: 0.20s; }
.card:nth-child(6) { animation-delay: 0.25s; }
.card:nth-child(7) { animation-delay: 0.30s; }
.card:nth-child(8) { animation-delay: 0.35s; }

@keyframes cardIn {
    from { opacity: 0; transform: translateY(16px) scale(0.98); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

.card::after {
    content: ''; position: absolute; inset: -1px; border-radius: inherit;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    opacity: 0; transition: opacity 0.4s; z-index: -1;
}
.card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow:
        0 12px 40px rgba(0, 0, 0, 0.5),
        0 0 0 1px rgba(129, 140, 248, 0.08);
}
.card:hover::after { opacity: 0.06; }

.card-accent {
    position: absolute; top: -1px; left: -1px; right: -1px;
    height: 2px; border-radius: var(--radius) var(--radius) 0 0;
    background: linear-gradient(90deg, var(--accent), var(--accent2));
    opacity: 0; transition: opacity 0.4s;
}
.card:hover .card-accent { opacity: 1; }

.card-header {
    display: flex; align-items: flex-start; gap: 14px; margin-bottom: 14px;
}
.card-icon {
    width: 40px; height: 40px; flex-shrink: 0;
    display: flex; align-items: center; justify-content: center;
    border-radius: var(--radius-sm);
    background: rgba(129, 140, 248, 0.08);
    color: var(--accent);
    transition: background 0.3s, box-shadow 0.3s;
}
.card:hover .card-icon {
    background: rgba(129, 140, 248, 0.14);
    box-shadow: 0 0 20px var(--accent-glow);
}
.card-icon svg { width: 22px; height: 22px; }

.card-info { flex: 1; }
.card h2 {
    font-size: 14px; font-weight: 600; margin-bottom: 2px;
    letter-spacing: -0.2px;
}
.card-desc {
    font-size: 12px; color: var(--text3); line-height: 1.4;
}

.card-body {
    display: flex; flex-direction: column; gap: 8px;
    margin-bottom: 16px; flex: 1;
}
.card-body input[type="file"] {
    color: var(--text2); font-size: 12px; cursor: pointer;
    padding: 8px 0;
}
.card-body input[type="file"]::file-selector-button {
    background: rgba(255,255,255,0.04); border: 1px solid var(--border);
    color: var(--text2); padding: 6px 14px; border-radius: var(--radius-sm);
    font-size: 11px; cursor: pointer; margin-right: 10px;
    font-family: var(--font); transition: all 0.2s;
}
.card-body input[type="file"]::file-selector-button:hover {
    border-color: var(--accent); color: var(--accent);
    background: rgba(129, 140, 248, 0.06);
}

.card-body input[type="text"],
.card-body input[type="number"],
.card-body select {
    background: rgba(255,255,255,0.03); border: 1px solid var(--border);
    color: var(--text); padding: 9px 12px; border-radius: var(--radius-sm);
    font-size: 13px; font-family: var(--mono); width: 100%;
    transition: border-color 0.2s, box-shadow 0.2s;
}
.card-body select { font-family: var(--font); cursor: pointer; }
.card-body input:focus,
.card-body select:focus {
    outline: none; border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.row-2, .row-3 { display: grid; gap: 8px; }
.row-2 { grid-template-columns: 1fr 1fr; }
.row-3 { grid-template-columns: 1fr 1fr 1fr; }

/* ── Button ── */
.btn {
    width: 100%; padding: 11px 0;
    background: rgba(129, 140, 248, 0.06); color: var(--accent);
    border: 1px solid rgba(129, 140, 248, 0.2); border-radius: var(--radius-sm);
    font-size: 13px; font-weight: 600; cursor: pointer;
    letter-spacing: 0.3px; font-family: var(--font);
    transition: all 0.25s; position: relative; overflow: hidden;
}
.btn::before {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    opacity: 0; transition: opacity 0.25s;
}
.btn span { position: relative; z-index: 1; }
.btn:hover {
    border-color: var(--accent); color: #fff;
    box-shadow: 0 4px 20px var(--accent-glow);
}
.btn:hover::before { opacity: 1; }
.btn:active { transform: scale(0.98); }
.btn:disabled {
    border-color: var(--border); color: var(--text3); cursor: not-allowed;
    background: rgba(255,255,255,0.02); box-shadow: none;
}
.btn:disabled::before { opacity: 0; }

/* ── Modal Overlay ── */
.modal-overlay {
    position: fixed; inset: 0; z-index: 1000;
    display: flex; align-items: center; justify-content: center;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
    opacity: 0; pointer-events: none;
    transition: opacity 0.3s ease;
}
.modal-overlay.show {
    opacity: 1; pointer-events: auto;
}

.modal {
    background: var(--surface-solid); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 0; width: 440px; max-width: 90vw;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(129, 140, 248, 0.1);
    transform: translateY(20px) scale(0.96);
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}
.modal-overlay.show .modal {
    transform: translateY(0) scale(1);
}

.modal-accent {
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent2), #c084fc);
}

.modal-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 20px 24px 0;
}
.modal-header h3 { font-size: 16px; font-weight: 700; }
.modal-status {
    font-size: 10px; padding: 4px 10px; border-radius: 100px;
    font-weight: 700; letter-spacing: 0.5px; text-transform: uppercase;
}
.modal-status.success {
    background: rgba(52,211,153,0.12); color: var(--green);
    box-shadow: 0 0 12px var(--green-glow);
}
.modal-status.error {
    background: rgba(248,113,113,0.12); color: var(--red);
    box-shadow: 0 0 12px var(--red-glow);
}

.modal-close {
    width: 28px; height: 28px; border: 1px solid var(--border);
    border-radius: 50%; background: transparent; color: var(--text3);
    font-size: 14px; cursor: pointer; display: flex; align-items: center;
    justify-content: center; transition: all 0.2s; line-height: 1;
}
.modal-close:hover { border-color: var(--accent); color: var(--accent); }

.modal-body {
    padding: 20px 24px 24px;
}

.modal-downloads {
    display: flex; flex-direction: column; gap: 10px;
}
.download-link {
    display: flex; align-items: center; gap: 12px;
    padding: 14px 18px; background: rgba(52,211,153,0.06);
    border: 1px solid rgba(52,211,153,0.2); color: var(--green);
    text-decoration: none; border-radius: var(--radius-sm);
    font-size: 13px; font-weight: 600; letter-spacing: 0.3px;
    transition: all 0.25s; position: relative; overflow: hidden;
}
.download-link::before {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(52,211,153,0.08), rgba(34,211,238,0.05));
    opacity: 0; transition: opacity 0.3s;
}
.download-link:hover::before { opacity: 1; }
.download-link:hover {
    border-color: var(--green);
    box-shadow: 0 0 24px var(--green-glow);
    transform: translateY(-1px);
}
.download-link svg {
    width: 18px; height: 18px; flex-shrink: 0;
}
.download-link .dl-text {
    flex: 1;
}
.download-link .dl-hint {
    font-size: 10px; color: var(--text3); margin-top: 1px;
}

.modal-error {
    text-align: center; padding: 8px 0;
}
.modal-error .err-icon {
    width: 48px; height: 48px; margin: 0 auto 12px;
    border-radius: 50%; background: rgba(248,113,113,0.1);
    display: flex; align-items: center; justify-content: center;
    color: var(--red); font-size: 24px;
}
.modal-error p { color: var(--text2); font-size: 13px; }

/* ── Spinner ── */
.spinner {
    display: inline-block; width: 14px; height: 14px;
    border: 2px solid rgba(255,255,255,0.1); border-top-color: var(--accent);
    border-radius: 50%; animation: spin 0.7s linear infinite;
    vertical-align: middle; margin-right: 6px; position: relative; z-index: 1;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Footer ── */
.footer {
    text-align: center; padding-top: 48px;
    border-top: 1px solid var(--border); margin-top: 48px;
}
.footer p {
    font-size: 12px; color: var(--text3);
    display: flex; align-items: center; justify-content: center; gap: 8px;
}
.footer .dot-sep {
    width: 4px; height: 4px; border-radius: 50%; background: var(--text3);
}

/* ── Responsive ── */
@media (max-width: 860px) {
    .hero h1 { font-size: 36px; }
    .stats-strip { gap: 28px; }
    .api-grid { grid-template-columns: 1fr; }
    .row-3 { grid-template-columns: 1fr; }
}
@media (max-width: 500px) {
    .container { padding: 16px 14px 60px; }
    .hero { padding: 12px 0 20px; }
    .hero h1 { font-size: 28px; }
    .hero-desc { font-size: 14px; }
    .config-bar { flex-direction: column; }
    .stats-strip { gap: 16px; }
    .stat-value { font-size: 20px; }
}